title: Time is of the essence for ParaHox homeobox gene clustering.
abstract: ParaHox genes, and their evolutionary sisters the Hox genes, are integral to patterning the anterior-posterior axis of most animals. Like the Hox genes, ParaHox genes can be clustered and exhibit the phenomenon of colinearity - gene order within the cluster matching gene activation. Two new instances of ParaHox clustering provide the first examples of intact clusters outside chordates, with gene expression lending weight to the argument that temporal colinearity is the key to understanding clustering.
authors.affiliation: The Scottish Oceans Institute, University of St Andrews, East Sands, St Andrews, Fife, KY16 8LB, UK.
authors.forename: Myles
authors.initials: M
authors.lastname: Garstang
authors.forename: David E K
authors.initials: DE
authors.lastname: Ferrier
mesh_terms: D000818:Animals; D019143:Evolution, Molecular; D005801:Genes, Homeobox / Q000235:genetics*; D018398:Homeodomain Proteins / Q000235:genetics*; D005810:Multigene Family / Q000235:genetics*; D010802:Phylogeny; D013997:Time Factors
chemical_list: D018398:Homeodomain Proteins